Taxon Details

Lyonothamnus floribundus ssp. floribundus

Santa Catalina Island ironwood

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Taxon Summary:

Lyonothamnus floribundus ssp. floribundus, commonly known as Santa Catalina Island ironwood, is a perennial evergreen tree in the Rosaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, and Cismontane woodland, growing at elevations from 75 to 500 meters. Lyonothamnus floribundus ssp. floribundus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Lyonothamnus floribundus Gray ssp. floribundus
Common Name: Santa Catalina Island ironwood
Family:	Rosaceae
Element Code:	PDROS12012
USDA Plants Symbol:	LYFLF
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G3T2
State Rank:	S2
Other Status:	IUCN_VU; SB_CalBG/RSABG; SB_SBBG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2021-07-14

Ecology and Life History

Lifeform: perennial evergreen tree

Blooming Period: May-Jun

Elevation:
75 - 500 meters
245 - 1640 feet

General Habitats:

Broadleafed upland forest
Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by herbivory from non-native deer on SCT Isl. Possibly threatened by erosion. Feral herbivore populations increasingly under control; stump-sprouting and seedlings recently noted.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	4	20 %
Non-native animal impacts	3	15%
Grazing	2	10%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					20
A	B	C	D	X	U
0	1	0	0	0	19

Occurrence Status:
Historical >20 Years	18
Recent <=20 Years	2

Presence:
Presumed Extant	20
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX)

Quads: Name (Quad Code)
Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory